package com.cui.demoshiro.config;

import com.cui.demoshiro.pojo.Function;
import com.cui.demoshiro.pojo.Role;
import com.cui.demoshiro.pojo.User;
import com.cui.demoshiro.service.function.FunctionService;
import com.cui.demoshiro.service.user.UserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;

import javax.annotation.Resource;
import java.util.List;

public class MyShiroRealm extends AuthorizingRealm {

    @Autowired
    private FunctionService functionService ;

    @Resource
    private UserService userService ;

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("权限配置-->MyShiroRealm.doGetAuthorizationInfo()");
        SimpleAuthorizationInfo authorizationInfo = new SimpleAuthorizationInfo();
        User userInfo  = (User)principalCollection.getPrimaryPrincipal();
        for(Role role:userInfo.getRoleList()){
            authorizationInfo.addRole(role.getRoleCode());
            List<Function> functionList = functionService.getFunctionListByRole(role.getId()) ;
            for(Function p:functionList){
                System.out.println(p.getFunctionCode()+":"+p.getFunctionName());
                authorizationInfo.addStringPermission(p.getFunctionCode());
            }
        }
        return authorizationInfo;
    }

    /*主要是用来进行身份认证的，也就是说验证用户输入的账号和密码是否正确。*/
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("MyShiroRealm.doGetAuthenticationInfo()");

        //获取用户的输入的账号.
        String username = (String)token.getPrincipal();
        System.out.println(token.getCredentials());

        //通过username从数据库中查找 User对象，如果找到，没找到.
        //实际项目中，这里可以根据实际情况做缓存，如果不做，Shiro自己也是有时间间隔机制，2分钟内不会重复执行该方法
        User userInfo = userService.getUserByLoginCode(username) ;
        System.out.println("----->>userInfo="+userInfo);
        if(userInfo == null){
            return null;
        }
        SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo(
                userInfo, //用户名
                userInfo.getPassword(), //密码
                ByteSource.Util.bytes(userInfo.getSalt()),//salt=username+salt
                getName()  //realm name
        );
        return authenticationInfo;
    }
}
